When (what age) would you even start to think about getting new furniture?

My ODD is 4 and a half, and my YDS is just 20 months. Our furniture is totally thrashed (even the leather pieces! - from all the food, stickey hands and spilt milk). If we only had our daughter, I would think we were close to being able to get new furniture, so not until ds is AT LEAST to the same point, if not later because he's a boy, and I expect him to be messier even longer.
What about you - when do you think it becomes safe to invest in new furniture? How much longer do I have to wait!?!

Food and drink stay in the kitchen. The problem with that is, our tables needs to be replaced and the one I want I cannot risk being ruined by markers and paint and whatever other craziness happens at our kitchen table.

...So we'll wait until they're old enough to work the sander and be able to put a new finish on my table if they ruin it.

We have a lot of nice furniture, but our kitchen table is from IKEA, and I won't get a nice new table until my youngest is at least 5. I like that the kids can make a mess and build stuff on the table without me stressing. I might even wait until the kids are even older, so I don't worry if they want to build things with tools or what not join the table. It is pretty much a huge chunk of solid wood. W can just keep sanding it down and stain it again if they ruin it.

I have a 5 1/2 year old and a 18 month old, and our couch is 4 years old in great shape. The kids aren't allowed to have food out of the kitchen ,except occassionally popcorn. (They can have water in a sippy cup or sports bottle other places.)

We take our shoes off at the door, so there's no dirty shoes on couches or anything.

Our biggest risk is pens/pencils/markers. DD likes to write a lot, and while she's pretty good about keeping writing stuff up high, DS is very quick and sneaky.

We moved to our first house and bought a whole houseful of new furniture when my oldest son was one. Then we moved to our second house and bought more new furniture a few years later when my middle child was one. I don't worry about new furniture and toddlers. Just don't let them eat on the furniture and don't let them walk around the house with markers and things like that. In all my years as a parent my kids have never ruined any furniture.

We got our sectional before our girls were even born, in 2001. We have that in our basement, and you'd never know it was 12 years old. We just spent a ton of money on new family room furniture this past Spring (new sofa, loveseat and coffee/end tables), and they still look brand new.

We don't allow food, drinks, crayons, crafts, whatever in the family room. Food and drink stay in the kitchen, and the other stuff stays in the playroom or the crafting area in our basement. The kids don't (and never have) been allowed to jump around on the furniture. Our kids have never ruined our furniture either. Heck, if anything, I've spilled more than they have since I do drink on the sofa, lol.